1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
//
// Copyright 2010 Ettus Research LLC
//
/*
* Copyright 2008,2009 Free Software Foundation, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <memory_map.h>
#include <i2c.h>
#include <string.h>
#include <stdio.h>
#include <db.h>
#include <hal_io.h>
#include <nonstdio.h>
typedef enum { UDBE_OK, UDBE_NO_EEPROM, UDBE_INVALID_EEPROM } usrp_dbeeprom_status_t;
static usrp_dbeeprom_status_t
read_raw_dboard_eeprom (unsigned char *buf, int i2c_addr)
{
if (!eeprom_read (i2c_addr, 0, buf, DB_EEPROM_CLEN))
return UDBE_NO_EEPROM;
if (buf[DB_EEPROM_MAGIC] != DB_EEPROM_MAGIC_VALUE)
return UDBE_INVALID_EEPROM;
int sum = 0;
unsigned int i;
for (i = 0; i < DB_EEPROM_CLEN; i++)
sum += buf[i];
if ((sum & 0xff) != 0)
return UDBE_INVALID_EEPROM;
return UDBE_OK;
}
/*
* Return DBID, -1 <none> or -2 <invalid eeprom contents>
*/
int
read_dboard_eeprom(int i2c_addr)
{
unsigned char buf[DB_EEPROM_CLEN];
usrp_dbeeprom_status_t s = read_raw_dboard_eeprom (buf, i2c_addr);
//printf("\nread_raw_dboard_eeprom: %d\n", s);
switch (s){
case UDBE_OK:
return (buf[DB_EEPROM_ID_MSB] << 8) | buf[DB_EEPROM_ID_LSB];
case UDBE_NO_EEPROM:
default:
return -1;
case UDBE_INVALID_EEPROM:
return -2;
}
}
|
